N20 JB4

M6NIAC · 07-13-2015, 06:06 PM

For those who already have the stage 2 jb4 installed in their N20 engines... Could you explain to me what each map does? I just purchased mine and would like to know which maps I should use with no risks! Thanks!

mike@x-ph.com · 07-14-2015, 11:06 AM

Map 0: JB4 disabled.
Map 1: Peak boost 20psi, suitable for most racing applications
Map 2: Peak boost 21psi, suggested for those using exhaust modifications and 93 RM2 octane or higher fuels
Map 3: Progressive Methanol Injection. Requires BMS methanol kit or BMS FSB for meth pump control.
Map 4: Stock performance, JB4 on
Map 5: 320i/520i map. Peak boost 17psi.
Map 6: User definable map. Suggested for troubleshooting by professionals only.
Map 7: Race gas map. Peak boost 23psi. This is a fairly aggressive map and increases engine damage risk. Use with caution.

SonicEndeavor · 07-15-2015, 02:08 PM

Yes, do be careful if you go really aggressive, as apparently the N20 head will crack once you get over 330 foot pounds of torque.

M6NIAC · 07-15-2015, 02:09 PM

Quote:

Originally Posted by SonicEndeavor

Yes, do be careful if you go really aggressive, as apparently the N20 head will crack once you get over 330 foot pounds of torque.

What do u mean it will "crack"

493263 · 07-15-2015, 03:20 PM

Quote:

Originally Posted by Arkooo528xi

What do u mean it will "crack"

Literally a crack in the cylinder heads lol. It cracks because it's more pressure and temperature than the heads can handle.

https://www.google.com/search?q=cyli...IVwZOACh1v0gB3

M6NIAC · 07-15-2015, 03:23 PM

Quote:

Originally Posted by 493263

Quote:

Originally Posted by Arkooo528xi

What do u mean it will "crack"

Literally a crack in the cylinder heads lol. It cracks because it's more pressure and temperature the heads can't handle.

https://www.google.com/search?q=cyli...IVwZOACh1v0gB3

Do you know how much pounds of torque i will gain with the jb4?

493263 · 07-15-2015, 03:25 PM

Uhhh... depends at what RPM. You'll probably gain more at low and mid rpm range than at the top.

M6NIAC · 07-15-2015, 03:28 PM

Quote:

Originally Posted by 493263

Uhhh... depends at what RPM. You'll probably gain more at low and mid rpm range than at the top.

But do you know the overall? Like is it over 330?

493263 · 07-15-2015, 04:56 PM

http://f30.bimmerpost.com/forums/sho....php?t=1084831

mike@x-ph.com · 07-17-2015, 01:19 PM

i always recommend using the recommended maps no matter which engine you have

07-13-2015, 06:06 PM	#1
M6NIAC Lieutenant 173 Rep 521 Posts Drives: 550 Join Date: Oct 2014 Location: Lansing iTrader: (0)	N20 JB4 For those who already have the stage 2 jb4 installed in their N20 engines... Could you explain to me what each map does? I just purchased mine and would like to know which maps I should use with no risks! Thanks!
	Appreciate 0 Tweet Quote

07-14-2015, 11:06 AM	#2
mike@x-ph.com Joint Chiefs of Staff 24095 Rep 190,633 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Map 0: JB4 disabled. Map 1: Peak boost 20psi, suitable for most racing applications Map 2: Peak boost 21psi, suggested for those using exhaust modifications and 93 RM2 octane or higher fuels Map 3: Progressive Methanol Injection. Requires BMS methanol kit or BMS FSB for meth pump control. Map 4: Stock performance, JB4 on Map 5: 320i/520i map. Peak boost 17psi. Map 6: User definable map. Suggested for troubleshooting by professionals only. Map 7: Race gas map. Peak boost 23psi. This is a fairly aggressive map and increases engine damage risk. Use with caution. __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
	Appreciate 0 Quote

07-15-2015, 02:08 PM	#3
SonicEndeavor Lieutenant 48 Rep 494 Posts Drives: 2014 535i MSport Join Date: Jun 2013 Location: California iTrader: (0)	Yes, do be careful if you go really aggressive, as apparently the N20 head will crack once you get over 330 foot pounds of torque.
	Appreciate 0 Quote

07-15-2015, 03:25 PM	#7
493263 Lieutenant 71 Rep 510 Posts Drives: 2011 550i xDrive Join Date: Aug 2014 Location: DC iTrader: (0)	Uhhh... depends at what RPM. You'll probably gain more at low and mid rpm range than at the top.
	Appreciate 0 Quote

07-15-2015, 04:56 PM	#9
493263 Lieutenant 71 Rep 510 Posts Drives: 2011 550i xDrive Join Date: Aug 2014 Location: DC iTrader: (0)	http://f30.bimmerpost.com/forums/sho....php?t=1084831
	Appreciate 0 Quote

07-17-2015, 01:19 PM	#10
mike@x-ph.com Joint Chiefs of Staff 24095 Rep 190,633 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	i always recommend using the recommended maps no matter which engine you have __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
	Appreciate 0 Quote